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Differential D13694

Define __builtin_clzll for x86 on MSVC
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Authored by angelsl on Oct 13 2015, 4:24 AM.

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compnerd

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angelsl updated this revision to Diff 37234.Oct 13 2015, 4:24 AM
angelsl retitled this revision from to Define __builtin_clzll for x86 on MSVC.
angelsl updated this object.
angelsl added a reviewer: compnerd.
angelsl added subscribers: compnerd, llvm-commits.
compnerd accepted this revision.Oct 14 2015, 7:32 PM
compnerd edited edge metadata.
This revision is now accepted and ready to land.Oct 14 2015, 7:32 PM
compnerd closed this revision.Oct 14 2015, 7:51 PM

SVN r250359.

Revision Contents

PathSize
lib/
builtins/
15 lines

Diff 37234

lib/builtins/int_lib.h

Context not available.
return 63 - leading_zero; return 63 - leading_zero;
return 64; return 64;
} }
#else
#define __builtin_clzl __builtin_clzll uint32_t __inline __builtin_clzll(uint64_t value) {
#endif if (value == 0)
return 64;
uint32_t msh = (uint32_t)(value >> 32);
uint32_t lsh = (uint32_t)(value & 0xFFFFFFFF);
if (msh != 0)
return __builtin_clz(msh);
return 32 + __builtin_clz(lsh);
}
#endif #endif
#define __builtin_clzl __builtin_clzll
#endif // defined(_MSC_VER) && !defined(__clang__)
#endif /* INT_LIB_H */ #endif /* INT_LIB_H */
Context not available.